ASNs in United Kingdom
1,865 Autonomous Systems are registered in United Kingdom, ordered by the IPv4 space our directory attributes to each. Page 1 of 19.
Networks 1-100 by IPv4 Space
The badge is how many IPv4 /24 blocks our directory attributes to each network. For the prefixes an AS is announcing right now, open its page.
- 53,931AS2856British Telecommunications Limitedbt.net
- 33,178AS5089Virgin Media Limitedvirginmedia.com
- 26,860AS5607Sky UK Limitedsky.com
- 26,776AS786Jisc Services Limitedjisc.ac.uk
- 15,449AS13285TalkTalk Communications Limitedpxc.co.uk
- 9,888AS5378Vodafone Limitedvodafone.co.uk
- 8,194AS6871Plusnetplus.net
- 7,829AS1273Vodafone Group PLCvodafone.com
- 5,815AS8220COLT Technology Services Group Limitedcolt.net
- 3,705AS4637Telstra Globaltelstrainternational.com
- 3,532AS8426ClaraNET LTDclaranet.co.uk
- 2,867AS5413Wavenet Limitedwavenet.co.uk
- 2,381AS31655Gamma Telecom Holdings Ltdgamma.co.uk
- 2,067AS206067Hutchison 3G UK Limitedthree.co.uk
- 2,061AS13037Zen Internet Ltdzen.co.uk
- 1,709AS8851GCI Network Solutions Limitednasstar.com
- 1,678AS42689Glide Student & Residential Limitedglidegroup.co.uk
- 1,572AS15395Rackspace Ltd.rackspace.com
- 1,504AS20860IOMART CLOUD SERVICES LIMITEDiomart.com
- 1,400AS8468ENTANET International Limitedcityfibre.com
- 1,137AS25180Exponential-E Ltd.exponential-e.com
- 980AS12390KCOM Group Limitedkcom.com
- 923AS201838Community Fibre Limitedcommunityfibre.co.uk
- 896AS25310Vodafone Limitedvodafone.com
- 803AS8607Digital Space Group Limiteddigitalspace.co.uk
- 786AS35228Telefonica UK Limitedo2.co.uk
- 701AS12703Pulsant (Scotland) Ltdlumison.net
- 599AS47474Virtual1 Limitedvirtual1.com
- 552AS56478Hyperoptic Ltdhyperoptic.com
- 551AS20712Andrews & Arnold Ltdaa.net.uk
- 545AS15404COLT Technology Services Group Limitedcolt.net
- 535AS39855Mod Mission Critical LLCmodmc.net
- 516AS198864Queen Mary University of Londonqmul.ac.uk
- 512AS8698NATIONWIDE BUILDING SOCIETYnationwide.co.uk
- 512AS15914British Airways plcbritishairways.com
- 512AS25369Hydra Communications Ltdbandwidth.co.uk
- 512AS395959XEROX CORPORATIONxerox.com
- 502AS63911NetActuate, Incnetactuate.com
- 476AS5587Itility Limiteditility.co.uk
- 468AS42831UK Dedicated Servers Limitedukservers.com
- 422AS8586TalkTalk Communications Limitedtalktalkbusiness.co.uk
- 416AS56329Gigaclear Limitedgigaclear.com
- 409AS13213THG HOSTING LIMITEDingenuitycloudservices.com
- 407AS6908Datahop - Six Degrees6dg.co.uk
- 400AS39326Syntura Group Limitedsyntura.io
- 394AS41354ITS Technology Group Limiteditstechnologygroup.com
- 388AS5503RM Education Ltdrm.com
- 387AS48101Trooli Ltd.trooli.com
- 379AS25160Vorboss Limitedvorboss.com
- 351AS42973Convergence Group (Wireless) Networks Limitedconvergencegroup.co.uk
- 348AS44574Network Services Ltd.thedx.co.uk
- 345AS41230ASK4 Limitedask4.com
- 339AS21267Wavenet Limitedwavenet.co.uk
- 335AS29550Team Blue Carrier Limitedsimplytransit.net
- 331AS24867Rackspace Ltd.rackspace.com
- 320AS49758Lloyds Banking Group PLClloydsbankinggroup.com
- 313AS61323ANS ACADEMY LIMITEDans.co.uk
- 312AS16082Spitfire Network Services Limitedspitfire.co.uk
- 308AS16247Convergence Group (Wireless) Networks Limitedconvergencegroup.co.uk
- 300AS15499Computacenter Management GmbH trading as Computacenter AG & Co.oHGcomputacenter.com
- 288AS2818BBCbbc.com
- 288AS9142Internexus Networks Limitedinternexus.co.uk
- 281AS51561ICUK Computing Services Limitedicuk.net
- 279AS60187London Grid for Learning Trustlgfl.net
- 272AS24775Qinetiq Limitedqinetiq.com
- 262AS7The Defence Science and Technology Laboratorydstl.gov.uk
- 260AS30740Exa Networks Limitedexa.net.uk
- 257AS8651MUFG Securities EMEA PLCmufg.jp
- 256AS15601Baring Investment Services Ltdbarings.com
- 256AS21296Pricewaterhousecoopers Services Limitedpwc.com
- 256AS31515Inmarsat Global Limitedinmarsat.com
- 256AS39400London Borough of Hackneyhackney.gov.uk
- 256AS201773University of Warwickwarwick.ac.uk
- 256AS209237NPL Management LTDnpl.co.uk
- 256AS214445The North Atlantic Treaty Organizationnato.int
- 252AS202596GNC Realisations 2026 Limitedg.network
- 237AS21054Natwest Markets PLCnatwestmarkets.com
- 235AS31727Node4 Limitednode4.co.uk
- 218AS35425Iomart Managed Services Limitedbytemark.co.uk
- 217AS59395Southern Communications Ltdsouthern-comms.co.uk
- 207AS12701Barclays Bank plcbarclays.co.uk
- 203AS15533Redcentric Solutions Ltdsungardas.com
- 199AS39356Avanti Broadband Ltdavantiplc.com
- 197AS41564Orion Network Limitedpacketexchange.eu
- 192AS8419Redcentric Solutions Ltdredcentricplc.com
- 190AS25577MAINFRAME & CYBERNETIC SYSTEMS LIMITEDbec.uk
- 189AS44444Forcepoint UK Limitedforcepoint.com
- 186AS5631Telcom Networks Limitedelevate.uk
- 186AS51043Aspire Technology Solutions Ltdaspirets.com
- 178AS205544Leaseweb UK Limitedleaseweb.com
- 175AS43915TrueSpeed Communications Limitedtruespeed.com
- 174AS35575Vaioni Group Ltdvaioni.com
- 172AS5482AllPoints Fibre Limitedallpointsfibre.uk
- 170AS48945OPEN FIBRE NETWORKS (WHOLESALE) LIMITEDofnl.co.uk
- 168AS212655YouFibre Limitedyoufibre.com
- 167AS49572Fujitsu Services Ltd.fujitsu.com
- 164AS41012The Cloud Networks Limitedthecloud.net
- 161AS8622TEAM BLUE INTERNET SERVICES UK LIMITEDnames.co.uk
- 161AS198566MAMUT RAHAL SOFTWARE - FZCOmamutrahal.ltd
- 160AS33920(aq) networks limitedaql.com
Looking for a different country? The ASN Directory lists every one we hold, with its network count.